Inbox by Zendesk - Work together on shared email app for iPhone and iPad

Inbox by Zendesk is multiplayer email. It lets you collaborate in real time and respond as one to questions, comments, and feedback.

• Inbox organizes your team’s shared emails, so there’s no question about ownership. You can assign an email to yourself or delegate to a team member.
• Work as a team to manage a marketing campaign or any other influx of email. Make sure every bit of feedback is heard — and responded to.
• Team members can leave internal notes on an email thread, so you can exchange knowledge, discuss ideas, and reach consensus before you reply.
• @mention a team member. See when someone is typing a reply to an email. Get real-time browser notifications when an update is made.
• Keep tabs on the email conversations you want to manage and see the conversation through to the end to make sure nothing falls through the cracks.